Josh Kerr, the 28-year-old Scot, aims for a marathon win after breaking the mile world record. He calls it a 'pipe dream' but remains committed to the challenge.

Kerr's ambition to win a major marathon is steep, given the physiological differences between track and marathon running. His focus on nutrition and power-to-weight is crucial but insufficient. Read more culture coverage.

Historical precedents show mixed results. Sifan Hassan transitioned successfully, while Mo Farah needed years to adapt. Kerr's meticulous approach suggests a gradual transition is likely. Related: Max Jolliffe Sets New Badwater 135 Record, Carmen Maria Perez Close Behind.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.